Spark plug



Jan. 28, 1936. G. c. BRINKER 2,028,896

SPARK PLUG Filed March 25, 1935 q By Attomey Inventm Patented Jan. 28,1936 UNITED STATES PATENT OFFICE 1 Claim.

rows.

Figure 3 is a bottom plan view of Figure 1. Referring in detail to thedrawing, the nu- The core or insulator which is generally designated 9includes the portion l conforming in shape to the upper bore portion 6and the lower tapering part I l which is fluted as indicated at l2 atseveral points of its circumference so as to provide for the passage ofcooling gases around and about the portion H. The lower end of the partI 0 of the plug is seated on a compression Washer I 3. The lower end ofthe portion H is approximately flush with the lower end of the body asshown.

One side of the body has a radial passage M which leads into acircumferential groove IE on the exterior of the portion ID of theinsulator which provides for the circulation of cooling gases and airaround the adjacent portion of the insulator.

Depending from the lower end at diametrically opposite sides of the bodyare the lugs 24 and 25 which have openings 26 and 27, respectively, toreceive the reduced ends 28 and 29 of the spark point which is generallydesignated 30.

The sparking point 30 is composed of a shaft 3| which is provided atequal distances from its center with the disks 32, 33 which bound thereduced portion 34 and are so spaced and sized as to present at equaldistances from the exposed lower end of the electrode 35 three differentsparking points, represented by the adjacent side of the reduced portion34 and the adjacent sides of the disks 32 and 33.

The reduced ends 28 and 29 of the sparking point 30 turn and laterallymove in the openings in the lugs 24 and 25 upon agitation of the fuelchanically throw therefrom any accumulations of oil or soft carbon, sothat the sparking points are kept clean and better ignition is obtained.

shown and described herein a preferred embodiment of my invention, it isto be definitely understood that I do not desire to limit theapplication of the invention thereto,

and any change or changes may be made in the point at the lower endthereof, said body having materials, and in the structure andarrangement a slidable and rotatable shaft disposed adjacent of theparts, Within the spirit of the invention the exposed end of theelectrode, and a pair of and the scope of the subjoined claim. spacedintegral disks on said shaft projecting What is claimed is:- from saidshaft beyond the free end of the elec- 5 A spark plug of the typedescribed comprising trode and spaced therefrom.

a body containing an insulator, said insulator having an electrodetherein having an exposed GEORGE C. BRINKER.

